Alert archive / Arizona / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 13, NWS Tucson, AZ

July 9, 2017Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 9, 2017, 6:13 PM MST for Pima County, Arizona. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 9, 2017, 6:13 PM MST (01:13 UTC)
Expired: Jul 9, 2017, 7:00 PM MST
In force: 47 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Pima County, AZ

The radar

The Phoenix radar (KIWA), 138 km from the middle of the area, began a volume at 01:16 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Phoenix, AZ (KPSR), launched 00:00Z, 1.2 hours before the alert went out and 140 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 322 J/kg
Mixed-layer CIN: -142 J/kg
Mixed-layer LCL: 2958 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

069 
WUUS55 KTWC 100113
SVRTWC
AZC019-100200-
/O.NEW.KTWC.SV.W.0013.170710T0113Z-170710T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
613 PM MST SUN JUL 9 2017

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Northwestern Pima County in southeastern Arizona...

* Until 700 PM MST

* At 611 PM MST, a line of severe thunderstorms was located 14 miles 
  southwest of Santa Rosa, or 26 miles northwest of Sells, moving 
  northwest at 15 mph. This group of storms continue to maintain 
  their severe characteristics.  

  HAZARD...60 mph wind gusts with blowing dust and very heavy rain 
           with up to penny size hail directly under the storm. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees, and water 
           flowing in area washes. 

* Locations impacted include...
  Organ Pipe National Monument, Santa Rosa, Santa Cruz, Ali Chuk,
  Kuakatch, Kupk, Pisinimo, Ventana, Papago Farms, Hickiwan,
  Pisinemo, Charco 27, Ak Chin, Mountain Village, Lukeville, Covered
  Wells, Anegam, Gu Vo, Gunsight and Vaya Chin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3251 11258 3250 11181 3170 11222 3192 11295
TIME...MOT...LOC 0111Z 112DEG 13KT 3217 11222 

HAIL...0.75IN
WIND...60MPH
 
$$

Cerniglia

1 follow-up statement

591 
WWUS55 KTWC 100135
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
635 PM MST SUN JUL 9 2017

AZC019-100200-
/O.CON.KTWC.SV.W.0013.000000T0000Z-170710T0200Z/
Pima-
635 PM MST SUN JUL 9 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MST
FOR NORTHWESTERN PIMA COUNTY...

At 632 PM MST, a line of severe thunderstorms was located 17 miles 
southwest of Santa Rosa, or 31 miles northwest of Sells, moving west 
at 15 mph. Received a report that a significant haboob has formed 
with a large area of blowing dust in advance of this line of storms. 

HAZARD...60 mph wind gusts, blowing dust ahead of the storm and very 
         heavy rain and penny size hail directly under the storms. 

SOURCE...Trained weather spotters. 

IMPACT...Expect damage to roofs, siding, and trees and water flowing 
         in local washes. 
         

Locations impacted include...
Organ Pipe National Monument, Santa Rosa, Santa Cruz, Ali Chuk,
Kuakatch, Kupk, Pisinimo, Ventana, Papago Farms, Hickiwan, Pisinemo,
Charco 27, Ak Chin, Mountain Village, Lukeville, Covered Wells,
Anegam, Gu Vo, Gunsight and Vaya Chin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3251 11258 3250 11181 3170 11222 3192 11295
TIME...MOT...LOC 0132Z 112DEG 13KT 3220 11230 

HAIL...0.75IN
WIND...60MPH
 
$$

Cerniglia

The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 9, 5:15 PM MST	Special Weather Statement	TWC	Pima	45 min
Jul 9, 5:32 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	43 min
Jul 9, 7:03 PM MST	Special Weather Statement	TWC		42 min
Jul 9, 7:09 PM MST	Areal Flood Advisory	TWC	Graham	3 hr
Jul 9, 8:15 PM MST	Blowing Dust Advisory	TWC	Pima, Pinal	105 min
Jul 10, 12:29 PM MST	Special Weather Statement	TWC	Greenlee	61 min
Jul 10, 12:56 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Jul 10, 1:33 PM MST	Flash Flood Warning	TWC	Graham	117 min
Jul 10, 2:01 PM MST	Special Weather Statement	TWC	Graham	59 min
Jul 10, 3:05 PM MST	Flash Flood Warning	TWC	Graham	3 hr
Jul 10, 3:48 PM MST	Special Weather Statement	TWC	Cochise	42 min
Jul 10, 3:57 PM MST	Areal Flood Advisory	TWC	Santa Cruz	2 hr
Jul 10, 4:07 PM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	3 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2017 Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.